Excellent video. If only all the professors of whose lectures I’ve sat in could explain things so clearly. I swear that they always think it’s their students fault for being incapable of comprehending it, when in reality they overcomplicate and thereby mystify what are in reality basic concepts which anyone can understand-so long as someone like you explains it.
You have NO IDEA just how much you helped me see the difference. I have a Rasp Pi 4, for about a year and a half now, and awesome fun they are. I have to learn so much more. I watch you guys all the time to help me learn electronics in a later life. I'm in my late fifties and I'm learning this on my own, with help from you guys and internet sources always helped. Superb Thank you....👌👍
@@FlokTheOne great this content was useful. Consider supporting this channel. Also check my other tutorials . Maybe you can find some more useful information for you
Brother, you have no idea how much you have helped me, i've been for some days already trying to figure this out and you were able to explain it very clearly, thanks for your video.
Boom! just like that, my switch actually controls my relay! I'm a 4th year Mech Engg student making a conveyor sorting system for school, and I could not for the life of me figure out why in the off position my relays would go nuts. Thank you, Mario. You saved me from a lot of frustration!
I've been working on making a buzzer controlled by a PWM signal for close to a week now. I've been troubleshooting my code since the beginning thinking the mistake was in there. After this video I solved my problem in less that 5 minutes. Great video!
Thank you so much mate. I'm doing a quiet big project for swimming pools, to control the filter pump, booster pump, chlorinator, heater, valve actuators, variable speed pumps etc, my project was working fine on protoboard, I printed the PCB and the button interferences show up on butons inside the MENU screen, now I'm using pullup method using the ESP32 internal resistors, and voilà it's working fine again. Many thanks for your time to make and post this video, I'm really gratefull. Cheers.
Thank you so much, I've been puzzed a lot seeing Arduino docs, not knowing what on earth pull-up/down resistor and built-in pull-up resistor are, now I know it clearly.
As newbie i can say , i've got same mistake(i realized that after whole day of thinking). Im really glad , that im not the only one who did that mistake😅
Wow! Best explanation yet! Perfect mix of theory and circuitry and how they work! Thanks. Still one puzzle. The original problem was due to noise voltage in the open or loose wire going to A0. In your diagram for pull down, that same wire is still there with the OPEN switch. Why isn't that same noise still present? Indeed it is now connected to ground via a resistor making the current flow for this very tiny voltage difficult. So why doesn't the original noise voltage still flow to A0?
Not being very electronic profficient I also had a problem to get my head around it. But in summary. Voltage doesn't from current does. If flows from positive voltage to ground. And through pulldown resistor and the use of voltage divider we set ground at the pin. Arduino detects the voltage value not the flowing current.
Thanks Mario. Excellent explanation. For this button/LED set up, is it necessary to use and Analog pin, or will the set up also work with a digital pin? Thanks
Something about 6:45 to 7:30 I just am not understanding. Why would it read high with a big fat resistor in the circuit? …i mean I get that I need to add a pull up / pull down resistor - but I can’t follow the logic of where/how the electricity is flowing. It’s strictly a ‘me’ problem…
It's not a practical micro controller project when you can eliminate the micro controller, but it's good for training and I still have to think when making a button or two for something. My code is on some kind of game level in comparison. You will need buttons or a button to set a number or have modes in the project - many, many times. Text is much worse, but we have all sorts of displays to show a little keyboard setup and use 2 buttons for moving a cursor and a third for enter and I2C keyboards and clever people showing how to do it. Most is a study problem, if you can't. Touch functionality is just "buttons" in another way and it's the same principles.
In pull-up configuration, why do we have all 5V when the button is not pressed ? Normally, shouldn't we have much less than that because of the big resistor of 10k ohms that will decrease those 5V ?
@@marios_ideas Actually he was not asking about the voltage divider when the circuit is closed, but why when the circuit is open the 5V goes through a 10k resistor to A0 but still remains 5V instead of decreasing for e.g. to 2V? I didn't understand this too.
A push button is a mechanical switch that consists of two states: pressed and unpressed. When unpressed, the button effectively disconnects the digital pin from ground, so the pull-up resistor is the only component in the circuit connected to the pin. Since the resistor has a high value (10k ohms), it limits the current flow to a very low level, and the voltage at the pin remains close to 5V.@@SebVEVO
Since there is no current-flow when the button is not pressed, just use U=R×I to understand. Without current there is no voltage drop after an resistor.
instead of pinMode (9,OUTPUT) is it possible to declare SDA(A4) or SCL(A5) as output to switch on an oled to show time for 5 seconds in a night clock project and a capacitive proximity sensor instead of a button?
Why does it not blink when we haven't pushed the button one time yet ? Why does it start to blink only when we do push the button and release it for the first time ? Does it ??
I guess only if you do not want to have the Pullup logic and want to stick to pulldown. For small project adding a resistor is not a big deal. but for more complex ones if you create custom PCB minimmising number of conponents is super important. A lot of people do not also realise that those pullup resistors are available:)
I haven't seen lately such a good tutorial describing things in general, congratulations! Everything is clear and explained in such a profesional way.
Thanks:) Makes it all worthwhile:)
Excellent video. If only all the professors of whose lectures I’ve sat in could explain things so clearly. I swear that they always think it’s their students fault for being incapable of comprehending it, when in reality they overcomplicate and thereby mystify what are in reality basic concepts which anyone can understand-so long as someone like you explains it.
You have NO IDEA just how much you helped me see the difference.
I have a Rasp Pi 4, for about a year and a half now, and awesome fun they
are. I have to learn so much more. I watch you guys all the time to help me
learn electronics in a later life. I'm in my late fifties and I'm learning this
on my own, with help from you guys and internet sources always helped.
Superb Thank you....👌👍
Glad I can be off help:) Consider supporting my channal.
I was stuck with this confusion whole day
you have no Idea how much you helped
THANK YOU
Thank you, this is the only video I found that described 'floating pin' and the influence of EMI!
Best description of the concept I have found thus far. Thank you very much for making this video!
Thank you dude, I have been trying and searching for a solution for more than a week til i came across your video
@@FlokTheOne great this content was useful. Consider supporting this channel. Also check my other tutorials . Maybe you can find some more useful information for you
Brother, you have no idea how much you have helped me, i've been for some days already trying to figure this out and you were able to explain it very clearly, thanks for your video.
Glad i was of help. Consider supporting my channel:)
Boom! just like that, my switch actually controls my relay! I'm a 4th year Mech Engg student making a conveyor sorting system for school, and I could not for the life of me figure out why in the off position my relays would go nuts. Thank you, Mario. You saved me from a lot of frustration!
One of the clearest explanations I've watched. Thanks a lot!
You are too kind:) Please consider supporting my channal.
NIIIIIICE JOB!! At last, pull-up, pull-down, pull-left, pull-right all understood. Thanks, man.
I've been working on making a buzzer controlled by a PWM signal for close to a week now. I've been troubleshooting my code since the beginning thinking the mistake was in there. After this video I solved my problem in less that 5 minutes. Great video!
Great it was helpful. Consider supporting my channel:)
Thank you so much mate.
I'm doing a quiet big project for swimming pools, to control the filter pump, booster pump, chlorinator, heater, valve actuators, variable speed pumps etc, my project was working fine on protoboard, I printed the PCB and the button interferences show up on butons inside the MENU screen, now I'm using pullup method using the ESP32 internal resistors, and voilà it's working fine again. Many thanks for your time to make and post this video, I'm really gratefull. Cheers.
Glad my content was of help to you. Consider supporting my channal
Thank you so much, I've been puzzed a lot seeing Arduino docs, not knowing what on earth pull-up/down resistor and built-in pull-up resistor are, now I know it clearly.
Finally someone explains it well! Thank you.
Glad you think so!
Very nicely done, and thanks for mentioning the on-board resistors.
You have been reading my mind lately. You are posting videos on topics I am researching haha
I have not been called a mind reader before:) Like the video if it was what you were looking for
Simplest tutorial i have seen so far, Thank you
Best Video concerning Pullups so far, thank you very much!
Wow, thanks!
Thanks for going to such great lengths animating all of this. Great work!
Glad you enjoyed it!
Not to much talking. Proof of everything with mathematical language which everyone understands, very good job, kydos to you.
You are too kind:)
Sir how do you calculate the resistor value (10k) ? Please help me...🥺. Thank you so much for this video😊.
Really well explained! Thanks so much. This will help me a bunch with a current project.
Wow it's really a great explanation and the illustrations are simple and awesome
Thanks:)
This is so good. OMG - you are such a great teacher. I am so impressed - Thank you!!!!
You are too kind:)
Questo è un video fantastico e spiegato da dio! grazie Mario
As newbie i can say , i've got same mistake(i realized that after whole day of thinking). Im really glad , that im not the only one who did that mistake😅
Clear explanation with example, Thank you sir
brilliant! thank you so much - so clear and logical.
THX:) Like the video if you enjoyed it. You support my channel this way
Great Video, love the first old bit, very cool, have subscribed
I am glad you liked it. Had lots of fun making that intro:)
great. Thanks. I didn't know that a pullup was already in Arduino. thanks
Wow! Best explanation yet! Perfect mix of theory and circuitry and how they work! Thanks. Still one puzzle. The original problem was due to noise voltage in the open or loose wire going to A0. In your diagram for pull down, that same wire is still there with the OPEN switch. Why isn't that same noise still present? Indeed it is now connected to ground via a resistor making the current flow for this very tiny voltage difficult. So why doesn't the original noise voltage still flow to A0?
Not being very electronic profficient I also had a problem to get my head around it. But in summary. Voltage doesn't from current does. If flows from positive voltage to ground. And through pulldown resistor and the use of voltage divider we set ground at the pin. Arduino detects the voltage value not the flowing current.
very clear presentation👍
Best tutorial. Thousand Thanks, Brother.
Thanks Mario. Excellent explanation. For this button/LED set up, is it necessary to use and Analog pin, or will the set up also work with a digital pin? Thanks
All pins have built in pull up resistors. I just chose to use Analog pin
Something about 6:45 to 7:30 I just am not understanding. Why would it read high with a big fat resistor in the circuit?
…i mean I get that I need to add a pull up / pull down resistor - but I can’t follow the logic of where/how the electricity is flowing.
It’s strictly a ‘me’ problem…
Thank u so much! it helped so much on my task from Senac xD
Glad I could be off help. Consider supporting my channel.
A very good explanation!
My pleasure:) like the video and subscribe to my channal. Also consider supporting it.
It's not a practical micro controller project when you can eliminate the micro controller, but it's good for training and I still have to think when making a button or two for something. My code is on some kind of game level in comparison. You will need buttons or a button to set a number or have modes in the project - many, many times. Text is much worse, but we have all sorts of displays to show a little keyboard setup and use 2 buttons for moving a cursor and a third for enter and I2C keyboards and clever people showing how to do it. Most is a study problem, if you can't. Touch functionality is just "buttons" in another way and it's the same principles.
Thank you sir! you mind sharing what online course I can get to do those animations you do?
All my animations are done in Powerpoint.
@@marios_ideas haha! really? amazing! I thought I need to learn a new skill for it! thank you sir!
@@PinoyTechTutorials I used PowerPoint at work. I do not think there are courses on just animations in powerpoint
Nicely done. Thank you.
Ty, u save my time i have same problem and now i know how to fix it.
Give video a like if you enjoyed it. Subscribe if you want to see similar content in the future:)
Perfect explanation, thank you
My pleasure:)
Thanks, very clear!
Great Video!
that was a creative intro
THX:)
In pull-up configuration, why do we have all 5V when the button is not pressed ? Normally, shouldn't we have much less than that because of the big resistor of 10k ohms that will decrease those 5V ?
Have you watched the video carefully. There is an explanation using voltage divider circuit to show how this works
@@marios_ideas Actually he was not asking about the voltage divider when the circuit is closed, but why when the circuit is open the 5V goes through a 10k resistor to A0 but still remains 5V instead of decreasing for e.g. to 2V?
I didn't understand this too.
A push button is a mechanical switch that consists of two states: pressed and unpressed. When unpressed, the button effectively disconnects the digital pin from ground, so the pull-up resistor is the only component in the circuit connected to the pin. Since the resistor has a high value (10k ohms), it limits the current flow to a very low level, and the voltage at the pin remains close to 5V.@@SebVEVO
Since there is no current-flow when the button is not pressed, just use U=R×I to understand. Without current there is no voltage drop after an resistor.
Just Thank you sir, just thank you
instead of pinMode (9,OUTPUT) is it possible to declare SDA(A4) or SCL(A5) as output to switch on an oled to show time for 5 seconds in a night clock project and a capacitive proximity sensor instead of a button?
Yes. You can do any other action. Led is just an example.
Can I write
pinMode(A0, input_pulldown)
When I put the up signal then pin no 9 is up otherwise low.
No . There are only pull-up resistors build in. You have to adjust the code to take this revers behavior into account
thank you dear you helped me a lot
Thank you, sir.
Why does it not blink when we haven't pushed the button one time yet ? Why does it start to blink only when we do push the button and release it for the first time ? Does it ??
You mean when we have a floating pin situation? It is completly random
ok, thanks
why would I want to use external resistors when I can let the arduinos internal resistor handle it?
I guess only if you do not want to have the Pullup logic and want to stick to pulldown. For small project adding a resistor is not a big deal. but for more complex ones if you create custom PCB minimmising number of conponents is super important. A lot of people do not also realise that those pullup resistors are available:)
@@marios_ideas alr, thank you for the response (-;
Thank you 🙏
Which one is better pull up or pull down?
There is virtually no difference. Internal Pull up wins, as you can use build in pull up resistors so then you do not have to use external resistors.
best explanation
Give video a like. Would help me a lot:)
helped so much thanks
thank you. concise.
Give video a like if you enjoyed it
thank you very much
My question here: Why 10k resistor, why to put a resistor ?
Maybe so that current only flows through the switch
Because when you press the button power will flow from 5v to ground directly and resulting short circuit
Useful!
ty
guys here from class 7
🤓
555th like... lol!
Thank you!